Note 190 — A CYCLOPÆDIA OF PRACTICAL RECEIPTS, PROCESSES, AND COLLATERAL INFORMATION (continued 16)
Reading edition
Sperm oil is commonly regarded as the best for blacking; but pale seal oil is thought by some to be quite as good. The cod-liver oil of the curriers, if clear, is less expensive, and probably better than either of them. Common olive oil, and refined rape oil, are, however, those most generally used by the blacking-makers.